/*
 * Copyright (C) 2023 HiHope Open Source Organization .
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>
#include <unistd.h>

#include "cmsis_os2.h"
#include "ohos_init.h"
#include "iot_gpio.h"

#define LED_TASK_GPIO 6
#define LED_TASK_STACK_SIZE 1024
#define LED_TASK_PRIO   25
#define DELAY_TICKS_50 (50)
#define GPIO_HIGH       (1)
#define GPIO_LOW        (0)
#define DELAY_TICKS_SHORT 100 // 短信号的单位时间
#define DELAY_TICKS_LONG (DELAY_TICKS_SHORT * 3) // 长信号的单位时间
#define DELAY_TICKS_INTERVAL 100 // 信号间隔
#define DELAY_TICKS_CHAR (DELAY_TICKS_INTERVAL * 3) // 字符间隔
#define DELAY_TICKS_WORD (DELAY_TICKS_INTERVAL * 7) // 单词间隔

static void* GpioTask(void)
{
    IoTGpioInit(LED_TASK_GPIO);
    IoTGpioSetDir(LED_TASK_GPIO, IOT_GPIO_DIR_OUT);

    while (1) {
        // 发送 'S' (...)
        for (int i = 0; i < 3; i++) {
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_HIGH);
            osDelay(DELAY_TICKS_SHORT);
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_LOW);
            osDelay(DELAY_TICKS_INTERVAL);
        }

        // 字符间隔
        osDelay(DELAY_TICKS_CHAR);

        // 发送 'O' (---)
        for (int i = 0; i < 3; i++) {
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_HIGH);
            osDelay(DELAY_TICKS_LONG);
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_LOW);
            osDelay(DELAY_TICKS_INTERVAL);
        }

        // 字符间隔
        osDelay(DELAY_TICKS_CHAR);

        // 再发送 'S' (...)
        for (int i = 0; i < 3; i++) {
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_HIGH);
            osDelay(DELAY_TICKS_SHORT);
            IoTGpioSetOutputVal(LED_TASK_GPIO, GPIO_LOW);
            osDelay(DELAY_TICKS_INTERVAL);
        }

        // 单词间隔
        osDelay(DELAY_TICKS_WORD);
    }

    return NULL;
}

static void GpioExampleEntry(void)
{
    osThreadAttr_t attr;

    attr.name = "GpioTask";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = LED_TASK_STACK_SIZE;
    attr.priority = LED_TASK_PRIO;

    if (osThreadNew((osThreadFunc_t)GpioTask, NULL, &attr) == NULL) {
        printf("[GpioExample] Falied to create GpioTask!\n");
    }
}
SYS_RUN(GpioExampleEntry);
